The Guadalquivir River

Learn Something About Its Fish

Interesting facts

  • The fishing products constitute one of the principal tourist attractions of the Andalusian littoral, the community of fish of the low Guadalquivir acquires now economic and social dimensions.
  • 4396 km out of the 10566 km of fluvial courses of the Guadalquivir lack fish, either autochthonous or exotic.

Reasons of species extinction

Not long ago, Guadalquivir river was home to numerous species, mainly to the barbel, the Iberian nase and the "cacho". However, its amount and variety of species has decreased as time has gone by. Some factors have caused this diminution:
  • Introduction of foreign species like the "capa" or the back-bass, and presence of threatening species such as the catfish.
  • Introduction and the attendant plague of the red American crab at the end of the 80's.
  • Water pollution by uncontrolled poured in the water.
  • Increasing concentration of toxins from the excess of agricultural insecticides.
  • Habitat destruction, fragmentation and deterioration.

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Here you can see some fish

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This two fish are the most common species in the Guagalquivir river: Barbel and Iberian nase respectively.

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This is an eel, they can live in rivers or in the sea. They eat worms, insects or little fish. They're omnivorous.
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This is a sturgeon, this is the longest fish in the river, they can measure 4 meters and it's typical in the Guadalquivir river.
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This picture represents a trout. They only live in rivers.

Fish like indicators of pollution

the study of fish that lives in the river gives us information about the level of the water´s pollution.
the presence of heavy metals from waste residues, detergents and other contaminants affects the health of the fish and thanks to the ease with which we can easily capture to use as markers.
Luis Rízquez, Araceli Escobar, Nazaret Rodríguez